Patent US3038904A successfully refreshed from Google Patents.
US3038904A
Expired / Lapsed
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Method for separating amines
Assignee: Jefferson Chemical Co Inc
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Filing: 1959-09-23
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Granted: 1962-06-12
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Expires: 1979-09-23
Abstract
No abstract record available.
Inventors
- 👤 Norman B Godfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:27
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS FOR SEPARATING A MIXTURE OF AMINES COMPRISISNG: (A) A FIRST ALKYLENE OPEN CHAIN POLYAMINE CHARACTERIZED BY HAVING AMINE GROUPS SELECETED FROM THE CLASS CONSISTING OF PRIMARY AND SECONDARY AMINE GROUPS, EACH OF SAID CHAIN CONTAINING NOT MORE THAN THREE CARBON ATOMS, AND (B) A PIPERAZINE COMPOUND SUBSTITUTED ON ONE OF THE NITROGEN ATOMS WITH A SUBSTITIENT GROUP SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, HYDROXYETHYL AND AMINOETHYL, (C) SAID METHOD COMPRISING THE STEPS OF : (D) ADDING TO SAID MIXTURE OF AMINES A SALT SELECTED FROM THE GROUP CONSISTING OF SULFATES AND CHLORIDES OF COPPER, ANICKEL, COBALT AND ZINC TO THEREBY FORM A STABLE METAL COMPLEX OF SAID MATERIAL SELECTED FROM THE FIRAT POLYAMINE, AND (E) SEPARATING SAID STABLE METAL COMPLEX FROM SAID MIXTURE TO THEREBY EFFECT SAID SEPARATION.
Claim 2
Dependent Claim
132 words
A PROCESS FOR SEPARATING A MIXTURE OF AMINES COMPRISISNG: (A) A FIRST ALKYLENE OPEN CHAIN POLYAMINE CHARACTERIZED BY HAVING AMINE GROUPS SELECETED FROM THE CLASS CONSISTING OF PRIMARY AND SECONDARY AMINE GROUPS, EACH OF SAID CHAIN CONTAINING NOT MORE THAN THREE CARBON ATOMS, AND (B) A PIPERAZINE COMPOUND SUBSTITUTED ON ONE OF THE NITROGEN ATOMS WITH A SUBSTITIENT GROUP SELECTED FROM THE GROUP CONSISTING OF METHYL, ETHYL, HYDROXYETHYL AND AMINOETHYL, (C) SAID METHOD COMPRISING THE STEPS OF : (D) ADDING TO SAID MIXTURE OF AMINES A SALT SELECTED FROM THE GROUP CONSISTING OF SULFATES AND CHLORIDES OF COPPER, ANICKEL, COBALT AND ZINC TO THEREBY FORM A STABLE METAL COMPLEX OF SAID MATERIAL SELECTED FROM THE FIRAT POLYAMINE, AND (E) SEPARATING SAID STABLE METAL COMPLEX FROM SAID MIXTURE TO THEREBY EFFECT SAID SEPARATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |